Mobile coiled tubing unit

ABSTRACT

The present invention is directed to a mobile coiled tubing unit that has a moveable coiled tubing reel and mast. The apparatus itself can be moved laterally using retractable jacks and hydraulic cylinders. The mast is retractable into a mast sleeve. The movable nature of the elements of the apparatus allow for easier alignment with the well head and balanced transportation. The reel can also be raised to increase clearance to facilitate transportation over rough or uneven terrain.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority benefit of U.S. Provisional PatentApplications 61/657,548 filed Jun. 8, 2012 and 61/701,448 filed Sep. 14,2012, the entire contents of both which are incorporated herein in theirentirety (where permitted).

FIELD OF THE INVENTION

The present invention is directed to the field of oil and gas drillingand well servicing operations, and in particular to mobile coiled tubingrigs used in oil and gas drilling and well servicing operations.

BACKGROUND

Coiled tubing is a continuous string of steel tubing that is rolled ontoa spool, and is used for a wide range of oil field services, includingbut not limited to drilling, logging, cleanouts, fracturing, cementing,underreaming, fishing, completion and production.

To facilitate coil tubing operations, mobile coiled tubing units, orrigs as they are also known, have been developed that can be easilytransported to and from the relevant well site. The rigs comprisecertain conventional elements, namely: a wheeled platform or frameforming the base of the rig, a reel to store and dispense the coiltubing string as needed, an injector head that is used to insert andretract the coiled tubing string from the well bore, some form of mastor hoist to elevate the injector above the well head, a control centerfor the operator, a power source for system power. In many, instances,to facilitate ease of transport, the unit comprises a tandem/tri-drivetruck and dedicated coil rig chassis such as a flat bed trailer.

Existing mobile coiled tubing rigs having certain limitations. Thevarious elements comprising the unit, in particular the spool of coiledtubing, are extremely heavy and if they not balanced correctly withrespect to each other then the stability of the mobile platform duringtransport can be greatly impaired. Such instability can compromise thesafe handling of the rig, especially during highway driving conditions.Further, on existing mobile coiled tubing rigs the various elements arein fixed positions dictated by the need to have certain required spacingbetween the coil and the injector during the performance of the downhole work. This fixed positioning of the various elements greatlyimpairs the mobility of the rig because the weight distribution inuneven and suboptimal to balanced transport and often results in certainaxle grouping arising that is over the allowed weight.

Rough and uneven terrain also poses a challenge to existing mobileunits. In particular, the limited clearance between the ground and thebottom of the coiled tubing spool often restricts the ability of themobile unit to traverse uneven ground. This can be problematic given theremote nature of a great many well sites.

Another limitation of existing mobile units is the limit placed on mastsize. The physical size of the mobile platform that the elements aremounted on are strictly regulated by transportation laws, and thiscoupled with the need to promote stability in accordance with allapplicable transportation regulations, dictates the maximum mast lengththat can be used. This frequently results in the use of a mast lengththat is shorter than the optimal length for coiled tubing operations.

A further limitation of existing mobile coiled tubing units is thedifficulty in aligning the injector and lubricators with the well head.Limited movement of the mast results in the need to repeatedly move theentire apparatus using the tractor until alignment is achieved. Movementof the entire apparatus with a tractor is time consuming and difficult.As a result, coiled tubing operations are frequently conducted withoutoptimal alignment which poses obvious safety risks. Existing mobileunits also have limited capacity to readily maintain the alignment ofthe injector with the well head following the addition and removal oflubricators which alters the relative height and alignment of theinjector to the well head.

A further limitation faced by operators of existing mobile coiled tubingunits arises by virtue of transportation and hauling regulations andrules that differ across various jurisdictions. In particular, eachjurisdiction has particular weight and balance guidelines for trailersand as such, while a mobile unit may comply in one province, state orterritory, it may not comply in another. This is problematic during longhaul transportations, or if the well site straddles the boundary betweentwo jurisdictions. Currently, with certain prior art mobile coiledtubing rigs, the reel has to actually be removed and transportedseparately because of non-conformity with the relevant transportationrules and regulations.

What is needed is a mobile coiled tubing rig that mitigates at leastsome of the limitations of the prior art.

SUMMARY OF THE INVENTION

In one aspect, the invention may comprise a mobile coiled tubing rigcomprising:

-   -   (a) an elongate frame having a longitudinal axis, the frame        being orientated in substantially horizontal plane;    -   (b) a coiled tubing reel rotatably mounted on the frame, the        reel being movable longitudinally along the frame, and        vertically in relation to the frame;    -   (c) a mast assembly comprising a mast pivotally mounted to the        frame, the mast being moveable between a first closed position        whereby the mast is in a substantially horizontal orientation        and a second open position whereby the mast is in a        substantially vertical orientation; and    -   (d) an injector mounted on the mast, the injector being        selectively movable along the length of the mast.

In one embodiment, the mast assembly may comprise a mast base which ismoveable longitudinally along the frame. The mast assembly may alsocomprise a mast sleeve within which the mast may telescopically extendor retract. The rig may further comprising a plurality of retractablesupport jack assembly, each support jack assembly comprising a supportjack and a telescoping horizontal cylinders affixed to the frame, thesupport jack assemblies being moveable between a horizontal storageposition and a deployed position wherein the support jacks engage theground beneath the frame, and wherein the telescoping horizontalcylinders may be used to actuate lateral movement of the frame relativethe support jacks when in the deployed position.

In one embodiment, the reel assembly may comprise a vertical liftmechanism comprising a horizontal pivot and a hydraulic cylinder topivotably lift or lower the reel assembly. The reel assembly may bemounted to a slide track on the frame, and is pushed or pulled along theslide track by a hydraulic cylinder. The reel assembly may comprises areel drive comprising a rack and pinion drive driven by a closed-loophydraulic motor.

In one embodiment, the mast assembly may comprise a pair of mast sleevesand a pair of parallel masts, interconnected by at least one crossmember, wherein one end of the at least one cross member is pivotablyattached to one mast and the other end is removably latched to the othermast.

In another aspect, the invention may comprise a mobile coiled tubing rigcomprising:

-   -   (a) an elongate frame having a longitudinal axis, the frame        being orientated in a substantially horizontal plane;    -   (b) a coiled tubing reel assembly mounted on the frame;    -   (c) a mast assembly comprising a mast pivotally mounted to the        frame, the mast being moveable between a first closed position        whereby the mast is in a substantially horizontal orientation        and a second open position whereby the mast is in a        substantially vertical orientation, wherein the mast assembly        comprises a mast base which is moveable longitudinally along the        frame; and    -   (d) an injector mounted on the mast, the injector being        selectively movable along the length of the mast.

In one embodiment, the mast assembly may comprise a mast sleeve withinwhich the mast may telescopically extend or retract. The reel assemblymay be movable longitudinally along the frame, and vertically inrelation to the frame.

BRIEF DESCRIPTION OF THE DRAWINGS

In the drawings, like elements are assigned like reference numerals. Thedrawings are not necessarily to scale, with the emphasis instead placedupon the principles of the present invention. Additionally, each of theembodiments depicted are but one of a number of possible arrangementsutilizing the fundamental concepts of the present invention. Thedrawings are briefly described as follows:

FIG. 1 is a side view of one embodiment of the apparatus of the presentinvention coupled to a tractor, booster and jeep.

FIG. 2 is a side view of one embodiment of the apparatus of the presentinvention coupled to a tractor, booster and jeep, and having a controlcabin.

FIG. 3 is a side view of one embodiment of the apparatus of the presentinvention with the mast disassembled and removed.

FIG. 4 is a top view of one embodiment of the apparatus of the presentinvention coupled to a tractor.

FIG. 5 is a view of one embodiment of the apparatus of the presentinvention with the mast not raised. FIG. 5A is a detail view on oneportion of FIG. 5.

FIG. 6 is a side view of one embodiment of the apparatus of the presentinvention with the mast raised.

FIG. 7 is a perspective view of one embodiment of the apparatus of thepresent invention with the mast raised.

FIG. 8 is another perspective view of one embodiment of the apparatus ofthe present invention with the mast raised.

FIG. 9 is an elevated side view of one embodiment of the apparatus ofthe present invention with a control cabin and without a mast.

FIG. 10 is a view of a reel assembly of one embodiment of the apparatusof the present invention. FIG. 10A shows a view of the reel assembly andshowing the reel axle. FIG. 10B shows the reel assembly apart from therig. FIG. 10C shows the reel axle clamp. FIG. 10D shows the end of thereel axle.

FIG. 11 is a view of the reel drive system of one embodiment of theapparatus of the present invention.

FIG. 12 is a partial side view of one embodiment of the apparatus of thepresent invention with the mast raised and the sliding base in the rearmost position.

FIG. 13 is a partial side view of one embodiment of the apparatus of thepresent invention with the mast raised and the sliding base in theforward most position.

FIG. 14 is a partial elevated rear view of one embodiment of theapparatus of the present invention with the mast raised.

FIG. 15 is an elevated side view of one embodiment of the apparatus ofthe present invention with the mast raised.

FIG. 16 is an elevated front view of one embodiment of the apparatus ofthe present invention with the mast raised. FIG. 16A is a detailed viewof a portion of FIG. 16 showing a partial view of the cradle and mastmembers of one embodiment of the apparatus of the present invention.

FIG. 17 is a view of the level wind apparatus of one embodiment of theapparatus of the present invention. FIG. 17A is a view of the encoder ofthe level wind assembly of one embodiment of the apparatus of thepresent invention. FIG. 17B is a view of the level wind screw and wormgear drive box of the level wind assembly of one embodiment of theapparatus of the present invention. FIG. 17C is a view of the tubingguide of the level wind assembly of one embodiment of the apparatus ofthe present invention.

FIG. 18 is a diagrammatic depiction of a reel and level wind assembly ofone embodiment of the apparatus of the present invention.

DETAILED DESCRIPTION OF EMBODIMENTS

The invention relates to a mobile coiled tubing unit. When describingthe present invention, all terms not defined herein have their commonart-recognized meanings. To the extent that the following description isof a specific embodiment or a particular use of the invention, it isintended to be illustrative only, and not limiting of the claimedinvention. The following description is intended to cover allcombinations of features, alternatives, modifications and equivalentsthat are included in the spirit and scope of the invention, as definedin the appended claims.

In this description the terms “coiled tubing”, “coiled tubing string”shall be used interchangeably but in each instance shall mean thecontinuous steel tube pipe used in oil and gas drilling, production andmaintenance operations.

The present invention is directed to a mobile coiled tubing unit, or rigas it is also known, having a moveable coiled tubing reel or a moveablemast, or both a moveable reel and mast. In one embodiment, the unit isconfigured for transport using a moveable coiled tubing reel and amoveable mast that is retractable into a mast sleeve to achievedimensional requirements for transport. The apparatus itself can bemoved laterally using retractable jacks and hydraulic cylinders for wellalignment and moving from one well to the next. In one embodiment, themast base moves forward and back to achieve well head alignment andinjector alignment in various positions without need of repositioning oraltering rig heights. The reel can also be raised to increase clearanceto facilitate transportation over rough or uneven terrain, therebyallowing the rig to accommodate a larger reel.

FIG. 1 depicts one embodiment of a rig (50) configured as a wheeledtrailer coupled to a tractor (52). The rig comprises a substantiallyrectangular horizontal frame (12) having a longitudinal axis. Thevarious mechanical elements of the rig (50) are mounted on or to theframe (12). The rectangular frame (12) has a front end (11) that isclosest to the tractor during transportation and a rear end (13) that isfurthest from the tractor (52) during transportation, and two longersides connecting the two ends (11, 13). Although the embodimentsdescribed herein depict the rig (50) as a wheeled trailer, it can beunderstood that other suitable transportation means may be employed. Forexample, the apparatus could be skid mounted, or track systems could beused instead of wheels.

The frame (12) comprises cross members (17) spanning the trailer in anorientation that is perpendicular to the longitudinal axis. In oneembodiment, the frame members are reinforced or have greater structuralstrength in the vicinity of the reel.

The frame (12) has a plurality of ground-engaging wheels (14) proximateto its rear end (13) and a hitch (18) proximate to its front end (11).In one embodiment, the hitch (18) consists of a king pin that mates withfifth wheel mounted on the tractor (50). The hitch (18) and wheels (14)allow the apparatus (50) to be towed by a tractor (52) in a conventionalmanner. In one embodiment, a booster component attached to the back ofthe frame and/or a jeep disposed between the truck and the frame may beused to increase the capacity of the combined truck and trailer bydistributing weight to the extra wheels. They can be used separately ortogether as needed in order to help the unit conform to highway weightregulations. During operation, the rig (50) may be decoupled from thetractor (52) and stabilized in a horizontal orientation usingretractable hydraulic rig jacks (9) located proximate to each corner ofthe rectangular frame (12). Additional jack stands (9A) may be providedfor use when the rig is not in use and not coupled to a tractor or jeep.

In one embodiment, a control cabin (16) is mounted on the frame inposition proximate to the front end (11). The control cabin (16)contains all of the controls and instrumentation necessary to operatethe apparatus (50). The control cabin may be provided on a separatetrailer unit, or the unit may be remotely controlled.

A coiled tubing reel (46) is mounted on an axle (48) extending the widthof the frame (12) and attached at each end to a reel drive frameassembly (66) mounted on the long sides of the frame (12). In oneembodiment, the reel is approximately longitudinally centred on theframe. In the embodiment shown in the Figures, the reel axle is drivenby hydraulic motors (70) through a pinion gear box (64) and a driveadapter plate (68), all of which is mounted on the reel drive frameassembly (66). The drive adapter plate has a keyed opening which mateswith an axle adapter plate (69) fixed to the end of the axle (48). Thisconfiguration permits the reel axle (48) to slide into the drive adapterplates (68) during assembly. The adapter plates are fixed together witha drive clamp (67) which encircles the adapter plates (68, 69). Thedrive clamp may comprise of two semi-circular portions which are hingedtogether at one end, and which bolt together at the other.

In one embodiment, a closed-loop hydraulic motor (70) is used to controlthe torque being placed on the reel drive system, and tension of tubingbetween the reel and injector.

In one embodiment of the present invention, the reel assembly comprisesa level wind assembly (71). The level wind assembly (71) positions thetubing (not shown) as it is being wound onto the reel (46). The levelwind assembly (71) is comprised of a tubing guide (75), a level windscrew (72), and a hydraulic worm drive gear box (74), a controller andan encoder (73). The lateral position of the tubing guide (75) iscontrolled by the controller which determines the rotation of the levelwind screw (72). In one embodiment, the level wind screw is driventhrough an enclosed hydraulic drive gear box (74), although other drivemechanisms such as a conventional chain and sprocket drive system mayalso be suitable. The worm drive gear box system reduces moving partssubject to wear and improves control of the tubing position on the reel.Tubing size adjustments can be made remotely with the controller so nomechanical changes need to be made. An encoder (73) accuratelydetermines the lateral position of the tubing guide and the informationis sent to the controller that controls the hydraulic worm drive (74).

The reel drive frame assembly (66) and the axle (48) and the reel (46)mounted thereon, are movable backwards and forwards along slide tracks(23) mounted on the frame (12). Accordingly, the reel (46) may be movedto a position more proximate to the front end (11), or more proximate tothe rear end (13) as desired by the operator, or for transport purposes.The longitudinal actuation of the reel assembly (66) may accomplishedwith a pair of hydraulic cylinders (22).

The reel may also be raised vertically by pivoting the reel drive frameassembly (66) upwards about a pivoted connection (27) between the reeldrive frame assembly (66) and the slide track (23), as shown in FIG. 7.As such, the reel (46) may be elevated relative to the frame, which maycreate greater clearance between the ground and the lowest point of thereel (46). The pivoting actuation of the reel assembly (66) may beaccomplished using more hydraulic cylinders (26), as may be seen in FIG.10.

The ability to move the reel (46) both longitudinally and vertically mayprovide several advantages. First, the reel (46) can be raised toincrease clearance thereby facilitating transportation of the rig (50)over rough or uneven terrain. Second, the reel (46) when loaded withcoiled tubing is extremely heavy, and the longitudinal and verticalmovement of the reel (46) can be used to balance the load so that theapparatus (50) is more stable during transportation. For example, thereel (46) may be moved towards the second end (13) during transport andtowards the first end (11) during operation. Furthermore, differentjurisdictions have differing weight balance guidelines, rules andregulations for mobile coiled tubing rigs, and thus the ability to movethe reel (46) may allow conformity with the rules of the relevantjurisdiction.

Mounted at the rear end (13) of the frame (12) is a mast assemblycomprising a mast base (1). A mast sleeve (7) is pivotally mounted onthe mast base (1). A mast (4) is slidably mounted within the mast sleeve(7) and has an upper end (38) and a lower end (40). A hydraulic cylinder(6) is used to extend or retract the mast (4) within the sleeve (7). Inone embodiment, the sleeve is open at the bottom end, so that the bottomof the mast may protrude when in a lowered position. In one embodiment,the mast (4) may comprises two parallel masts each having its own mastbase (1) and sleeve (7), interconnected by cross members (34) and a basecross member (1A). In one embodiment, one or more of the cross members(34) may be removably latched at one end and may be pivoted out of theway using a cylinder (35) to allow the cradle (60) to pass, as shown inFIGS. 13 and 14.

A pair of hydraulic cylinders (44) actuate the mast sleeve and mastbetween a transport position where the mast is substantially horizontalas shown in FIG. 1, and an operable position where the mast sleeve (7)and mast (4) are substantially upright as shown in FIG. 6. An elevatedsupport structure (42) located proximate to the front end (11) of theframe supports the mast (4) when in its closed transport position.

A cradle (60) supports the injector (5) and goose neck (20) and isslidably moveable along the length of the mast (4). Duringtransportation, the cradle (60), injector (5) and goose neck (20) arelowered to the lower end (40) of the mast (4). In one embodiment, thegoose neck (20) is comprised of hinged parts to allow it to betransported in a folded configuration. To facilitate coiled tubingoperations, when the mast is raised, in one embodiment, the cradle (60)is raised up the mast (4) by hydraulic motors driving pinion gears thatengage a gear rack on each side of the mast (not shown). When the mastis raised to an operating position, and the cradle (60) is raisedtowards the upper end (38) of the mast (4), lubricators (28) and a blowout preventer (32) may be suspended beneath the injector (5) and areconnected to the well head (30) in conventional manner.

The mast base (1), and correspondingly the mast sleeve (7) and the mastitself (4), are movable along the longitudinal axis (A) of the apparatus(50) by means of a sliding track (3) and a pair of hydraulic cylinders(2). In one embodiment, the mast base (1) can be extended such that itoverhangs the rear end (13) of the frame (12) as shown in FIG. 12 or canbe moved to a position more proximate to the front end (11) as shown inFIG. 13. The ability to selectively move the mast (4) longitudinallyfacilitates balancing of the apparatus (50) for transportation in thesame manner as described above for the reel (46) but also facilitatesmovement of the mast to align the injector (34) and lubricators (28)with the well head (30) without having to move the entire apparatus (50)and without having to use the tractor (52) to move the apparatus (50).

In one embodiment, retractable hydraulic rig jack assemblies comprisingrig jacks (9) are located at each corner of the rectangular frame (12),and each rig jack (9) is hingedly connected to a telescoping cylinder(10) that moves horizontally in and out of the frame (12).

When the apparatus is in a desired position, the telescoping cylinders(10) extend the jacks outwards. The jacks (9) are then deployeddownwards to support the weight of the apparatus. As a result, thetelescoping nature of the telescoping cylinders (10) allows lateralmovement of the entire apparatus (50) when the weight of the apparatus(50) is supported by the jacks (9). The operator can utilize thislateral movement to align the injector (5) and lubricators (28) with thewell head (30). During transportation, the retractable jacks (9) fold upand insert into the telescoping cylinders (10) and the telescopingcylinders (10) retract into the frame (12).

Accordingly, it can be understood that after the apparatus (50) has beenpositioned proximate to the well head (30) using the tractor, thecylinders (10) and jacks (9) are deployed to stabilize the apparatus(50) and the tractor (52) is decoupled. The reel (46) is moved into itsoperational position using the associated cylinders (22) and the mast israised into its substantially vertical operational position usingassociated cylinders (44). The operator is then able to utilize thelongitudinal movement of the mast (4) on the sliding tracks (3), and thelateral movement of the apparatus (50) using the cylinders (10) andjacks (9), the height of the mast (4) using the cylinders (6) to raiseand lowers the mast within the sleeve (7), and the ability to raise andlower the injector (5) up and down the mast (4) in the cradle (60) toprecisely align the injector (5) and the lubricators (28) with the wellhead (30). As lubricators (28) are added or removed depending on thenature of the coiled tubing operation, the operator may utilize the samemovement capabilities to facilitate alignment of the injector (5) withthe well head (30). The ability to alter the relative position of thevarious components of the apparatus, and the ability to move theapparatus (50) laterally, greatly reduces the time and effort requiredto achieve alignment in comparison to existing rigs.

During transportation, the mast (4) is fully retracted into the sleeve(7) thereby ensuring that the upper end (38) of the mast (4) does notprotrude beyond the tractor (52). During operation, the mast (4) can beextended from the sleeve (7) to give the mast (4) additional height.Also, the operator can also retract or extend the mast (4) incrementallyto assist with alignment of the injector (5) with the well head (30) andallows the operator to run the injector (5) in a relatively tall orshort configuration.

In one embodiment, for smaller units the mast (4) may be transportedseparately and assembled and installed on the rig at site. As such, therig would transport the reel and the injector between sites, as shown inFIG. 9.

In another embodiment of the present invention, the control cabin may bea remote location on a separate trailer unit. In a further embodiment,the separate trailer unit may also comprise of any or all of a hydraulicaccumulator for the blow out preventers, a HPU (Hydraulic Power Unit), acontrol cabin, a fuel tank, a generator and a tool room and a tool room.

Further, in the embodiments described above, hydraulic cylinders areutilized to move various components of the rig such as the reel (46),the mast base (1), mast (4), telescoping cylinders (10) and supportjacks (9). One skilled in the art will understand that there may beother suitable mechanical means to achieve such movement such as rackand pinion drives with electric or hydraulic motors, or chain drives orcable drives, without deviating from the scope and spirit of the presentinvention.

As will be apparent to those skilled in the art, various modifications,adaptations and variations of the foregoing specific disclosure can bemade without departing from the scope of the invention claimed herein.

1. A mobile coiled tubing rig comprising: (a) an elongate frame having alongitudinal axis, the frame being orientated in a substantiallyhorizontal plane; (b) a coiled tubing reel assembly mounted on theframe, the reel assembly being movable longitudinally along the frame,and vertically in relation to the frame; (c) a mast assembly comprisinga mast pivotally mounted to the frame, the mast being moveable between afirst closed position whereby the mast is in a substantially horizontalorientation and a second open position whereby the mast is in asubstantially vertical orientation; and (d) an injector mounted on themast, the injector being selectively movable along the length of themast.
 2. The rig of claim 1 wherein the mast comprises a mast base whichis moveable longitudinally along the frame.
 3. The rig of claim 1 ergwherein the mast assembly comprises a mast sleeve within which the mastmay slide to extend or retract the mast.
 4. The rig of claim 1 furthercomprising a plurality of retractable support jack assembly, eachsupport jack assembly comprising a support jack and a telescopinghorizontal cylinders affixed to the frame, the support jack assembliesbeing moveable between a horizontal storage position and a deployedposition wherein the support jacks engage the ground beneath the frame,and wherein the telescoping horizontal cylinders may be used to actuatelateral movement of the frame relative the support jacks when in thedeployed position.
 5. The rig of claim 1 wherein the reel assemblycomprises a vertical lift mechanism comprising a horizontal pivot and ahydraulic cylinder to pivotably lift or lower the reel assembly.
 6. Therig of claim 1 wherein the reel assembly is mounted to a slide track onthe frame, and is pushed or pulled along the slide track by a hydrauliccylinder.
 7. The rig of claim 1 wherein the reel assembly comprises areel drive comprising a rack and pinion drive driven by a hydraulicmotor.
 8. The rig of claim 7 wherein the reel drive comprises a driveadapter plate mounted to the drive and a complementary reel adapterplate mounted to a reel axle respectively, and further comprising a reeldrive clamp which encircles the drive adapter plate and reel adapterplate.
 9. The rig of claim 1 wherein the mast assembly comprises a pairof mast sleeves and a pair of parallel masts, interconnected by at leastone cross member, wherein one end of the at least one cross member ispivotably attached to one mast and the other end is removably latched tothe other mast.
 10. The rig of claim 1 which is a wheeled trailer,
 11. Amobile coiled tubing rig comprising: (a) an elongate frame having alongitudinal axis, the frame being orientated in a substantiallyhorizontal plane; (b) a coiled tubing reel assembly mounted on theframe; (c) a mast assembly comprising a mast pivotally mounted to theframe, the mast being moveable between a first closed position wherebythe mast is in a substantially horizontal orientation and a second openposition whereby the mast is in a substantially vertical orientation,wherein the mast assembly comprises a mast base which is moveablelongitudinally along the frame; and (d) an injector mounted on the mast,the injector being selectively movable along the length of the mast. 12.The rig of claim 11 wherein the mast assembly comprises a mast sleevewithin which the mast may slide to extend or retract the mast.
 13. Therig of claim 11 wherein the reel assembly is movable longitudinallyalong the frame, and vertically in relation to the frame.
 14. The rig ofclaim 11 further comprising a plurality of retractable support jackassembly, each support jack assembly comprising a support jack and atelescoping horizontal cylinders affixed to the frame, the support jackassemblies being moveable between a horizontal storage position and adeployed position wherein the support jacks engage the ground beneaththe frame, and wherein the telescoping horizontal cylinders may be usedto actuate lateral movement of the frame relative the support jacks whenin the deployed position.
 15. The rig of claim 13 wherein the reelassembly comprises a vertical lift mechanism comprising a horizontalpivot and a hydraulic cylinder to pivotably lift or lower the reelassembly.
 16. The rig of claim 13 wherein the reel assembly is mountedto a slide track on the frame, and is pushed or pulled along the slidetrack by a hydraulic cylinder.
 17. The rig of claim 13 wherein the reelassembly comprises a reel drive comprising a rack and pinion drivedriven by a hydraulic motor.
 18. The rig of claim 17 wherein the reeldrive comprises a drive adapter plate mounted to the drive and acomplementary reel adapter plate mounted to a reel axle respectively,and further comprising a reel drive clamp which encircles the driveadapter plate and reel adapter plate.
 19. The rig of claim 11 whereinthe mast assembly comprises a pair of mast sleeves and a pair ofparallel masts, interconnected by at least one cross member, wherein oneend of the at least one cross member is pivotably attached to one mastand the other end is removably latched to the other mast.
 20. The rig ofclaim 1 wherein the mast comprises a mast base which is moveablelongitudinally along the frame, and wherein the mast assembly comprisesa mast sleeve within which the mast may slide to extend or retract themast.